# 作   者：要努力，努力，再努力
# 开发日期：2022/4/21 10:31
print('p' in 'python')  # True
print('k' not in 'python')  # True
lst = [10, 20, 'python', 'hello']
print(10 in lst)
print(100 in lst)
print(10 not in lst)
print('-----------------------------------------')
for item in lst:
    print(item)
